New Banebots p80 Improvements

[T3_1565]

we used four p80 12:1 Transmissions on our Linkage Drive. THe linkage involves stresses not normally seem in a drive train (there is some side load when the wheels switch, thankfully omni wheels make that minimal) and our transmissions held out fine, and still hold out fine! We had one problem with the drive shaft slipping, but that was our fault (we took that one apart and forgot to add the compression ring back on it )

I think these transmissions are awesome, they are so easy to mount, and for linkage drive, thats the most important thing!!

EDIT: Here! This is the pic of our drive train and out mountings (notice the lack of support on the other side of the drive shaft, and it still ran fine!!

[Warren Boudreau]

I don't know the part number, but the 256:1 gearboxes inhaled audibly.

The last stage was constantly shearing teeth off of the planetary gears.

They should never have used brass gears for the final stage of reduction.

Too much torque.

[Billfred]

Originally Posted by Warren Boudreau

I don't know the part number, but the 256:1 gearboxes inhaled audibly.

The last stage was constantly shearing teeth off of the planetary gears.

They should never have used brass gears for the final stage of reduction.

Too much torque.

Warren, to be sure--are you referring to the CIM gearboxes? Those had a warning on the item page, which makes me think that shearing off planet teeth was actually a feature (in that you could install new planets rather than having everything seize completely as they did in 2007). I'm not sure whether that was the case for the smaller gearboxes, as BaneBots has apparently pulled them from the site.

[Bob Steele]

We used a pair of the 42 mm gear boxes mated with FP motors to bring our lift up and down. Initially we had some issues in Portland for several reasons.

The two motors had to drive in opposite directions because of our design and there was some type of stall activity (perhaps a looped line or something) that caused on side of the gear box to not be able to turn. This "allowed " the other gearbox to grind the non-moving one to pieces. Unfortunately this caused massive shearing of the gear teeth in both gear boxes. Also, unfortunately, this occurred in the quarterfinals requiring us to withdraw.

When we assessed the issue, I don't believe that we felt it had anything to do with any inadequacy in the gearboxes. We redesigned the lift and stiffened up everything and rebuilt in Seattle and we NEVER had another problem.

We have talked to Banebots about this and some other issues and they have told us that they are going to use steel gears next year in these transmissions.

We felt very happy with the gearboxes and the number of different ratios certainly gave us several options.

We would certainly continue to use these transmissions in the future.

One interesting note is that the motors that were running the transmissions that ate each other up were not damaged at all...

We really felt that the FP motors this year were very robust. I believe that they had thermal overload built in and that made a huge difference compared to years past. Even though the FP and the 550 had very similar motor curves, the FP motors were definitely more robust and able to handle stall conditions much better than the 550's.

These gearboxes are available on the website but listed under gearmotors and not gear boxes.... they come with a cheap 550 motor which does not have a fan.. These should be removed and replaced with a kit motor. either the 550, the FP or the 540 motor.. I would not suggest that you should use the 550 motor that is included with the gearboxes from Banebots.

We would definitely recommend the 42 mm gearboxes in the future to other teams. They are easy to mount and IF used with the proper engineering considerations, very useful and robust.

[Warren Boudreau]

They were Banebots. I had to run all over the pits in Atlanta to beg for replacements from teams.

[Lavapicker]

We used four P80 12:1 gearmotors with CIM's for our drive this year. We didn't have one problem with them and that's after attending SVR, Hawaii and Atlanta....41 official matches. I was very happy with them!

[PhilBot]

We used four P80 3:1 gearboxes with 4" wheels. Speedy, but not very torquey. But it was a race, right? We could nearly get 6 lines in Hybrid.

The only complaint/comment was that the actual CIM motor housing diameter is slightly larger than the 2.5" gearbox dimension, so you can't lay the motor-gearbox assembly on a flat plate, without recessing a slot for the motor to recess down into. It only takes about 1/16, but without it, the moter gets cocked up at a slight angle.